network          
 noun [ C ] uk/ˈnet.wɜːk/ us/ˈnet.wɝːk/
B2 网络,网状系统
a large system consisting of many similar parts that are connected together to allow movement or communication between or along the parts, or between the parts and a control centre
  a television network 电视网 
 a road/rail network 公路/铁路网 
 Massive investment is needed to modernize the country's phone network. 使全国电话网络实现现代化需要巨额投资。 
 We could reduce our costs by developing a more efficient distribution network. 我们可以通过发展更为高效的分销系统来降低成本。 
 a network of spies/a spy network 间谍网 
  计算机网络
a number of computers that are connected together so that they can share information
  We've just spent £1.9 million on improving our computer network. 我们刚刚花了190万英镑来改善我们的计算机网路。 
 - More examples
 - It is thought that they worked in collusion with the terrorist network.
 - The government has announced an ambitious programme to modernize the railway network.
 - Beneath the city lies a labyrinthine network of tunnels.
 - This new product line should be able to plug into our existing distribution network.
 
network  
verb uk/ˈnet.wɜːk/ us/ˈnet.wɝːk/
  (COMPUTERS)      
  [ T ]使(计算机)联网 
to connect computers together so that they can share information
  Our computer system consists of about 20 personal computers networked to a powerful file-server. 我们的计算机系统由大约20台个人电脑组成,这些电脑与一台功能强大的文件服务器联网。 
   (MEET PEOPLE)      
 [ I ](尤指工作中)建立关系网,建立人脉 
to meet people who might be useful to know, especially in your job
  I don't really enjoy these conferences, but they're a good opportunity to network. 我其实并不喜欢参加这些会议,不过这倒是建立关系网的好机会。